A Method of Generating Digital Signature via Handwriting

• Main Authors: Wen-Sung Lin, 林文松
• Other Authors: Hsieh, Bintsan
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/69387441372693473123

碩士 === 德明財經科技大學 === 資訊管理系 === 103 === As the popularity of the internet has grown, its services are getting more diverse and lead to a great change on crime patterns. The data and assets on the internet are constantly stolen and for the use of identity theft and so on. Therefore, the cryptography is applied to the encryption of electronic files and digital signature on the internet. It is necessary for some cryptography algorithm to encrypt with private key parameters as calculus, and generate digital signature. Citizen digital certificate is a fundamental establishment of public gold key built by the government. The government provides smartcard with private key in its virtual memory to applicants. Citizen digital certificate uses pin and cpu of smartcard as defense mechanism to protect private key. Private key might be stolen if pin code is being recorded illicitly or private key in smartcard is being cracked due to technology advance. Handwritten signatures are usually applied to personal identification. The study presents that the application of neural networks could determine the authenticity of a handwritten signature and associate with citizen digital certificate or private key. We take VB.Net develope HWDSS system in practice and it includes 1.Handwritten signature standardization 2. Learning and memory of ANN. 3.Association and recall of ANN. The system could associate real handwritten signature with citizen digital certificate pin and private key, then generate digital signature and verity it with corresponding public key. The procedure of keying pin in citizen digital certificate could be replaced by HWDSS (Handwriting Digital Signature System) in the experiment. The ultimate goal will be that the set of connection weights of artificial neural networks will be saved in smartcard after handwritten signature trained via HWDSS and it could replace citizen digital certificate physical private key. In that way, we could enforce security of system and avoid information disclosure.